Towel rack



FIG. 1 is a front view of the towel rack;

FIG. 2 is a rear view of the towel rack;

FIG. 3 is a first side view of the towel rack;

FIG. 4 is a second side view of the towel rack;

FIG. 5 is a top view of the towel rack; and,

FIG. 6 is a bottom view of the towel rack. 

The ornamental design for a towel rack, as shown and described. 